Pavement and armored joint-strip therefor.



A. E. DAVIS.

PAVEMENT AND ARMORED JOINT STRIP THEREFOR.l

APPLICATION FILED NOV. 3.19I4.

Patented Oct. 2, 1917.

ATTORNEYS WITNESSES UNITED STATES PATENT oEEIoE.

ANTHONY E. DAVIS, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOB 0F ONE-HALF T0 FREDERICK J. GEIGEB, 0F PHILADELPHIA, PENNSYLVANIA.

Specicadon of Letters Patent.

PatentedrOct. 2, 1917.

Application tiled November 3, 1914. Serial No. 870,017.

To all whom it may concern Be it known that I, ANTHONY E. DAVIS,

a citizen of the United States, residing in the city and county of Philadelphia, have invented a new and useful Pavement and Armored Joint-Strip Therefor, of which the following is a specification.

The object of myv present invention is to devise a pavement in which an expansion joint is employed, said expansion joint bein formed, supported and armored in a nove manner. f

With the above in view, my invention consists of a pavement, in conjunction with which an armored joint strip is employed, which is supported on the earth, roadbed or foundation, so that it serves to define the contour of the finished construction.

It further consists of an expansion joint in which the joint strip, which provides for expansion and contraction of the construction, is provided with an armor so that `the concrete work can be finished with a vrounded edge which is less likely to break downunder traffic conditions than if finished with a straight joint, as has heretofore been the practice.

It further consists of a novel construction and arrangement of an expansion joint which serves as a joint strip and also as a templet for the workmen.

Other -novel features and advantages of my invention will hereinafter more clearly ap ear-in the detailed description.

or the purpose of illustrating my invention, I have shown in the accompanying drawings, forms thereof which are at present preferred by me, since the same will give in practice satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and or- 45. ization of these instrumentalities as here- 1n shown and described.

Figure 1 represents a perspective view of the pavement embodying my invention, certain parts thereof havin been cut away to 50 more clearly show detai s of construction.

Fig. 2 Arepresents a sectional view of a stake and armor plate.

Fig. 3 represents, in pers ctive, another type of expansion joint em odying the in- 55 vention.

Fig. 4 re resents a sectional elevation of a portion o the construction seen in Fig'. 1, but showing. in addition,l a clip employed.

Fig. 5 represents,in perspective, another type of expansion joint embodying my invention.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings 1 designates the earth roadbed or prepared foundation on which the pavement is to be placed. 2 designates a road material, such as, for example, concrete, and between adjacent sections, such as, for example, 3 and 4, is located an expansion joint 5, the construction of which will now be set forth. 6 designates a strip of expansion material which may be formed from any desired material, which I preferably form from aerated asphalt' which I have described and broadly claimed in my co-pending application, Serial No. 870,016, tiled by me on the third day of November, 1914. The joint strip has assembled with respect thereto the bars 7 and during the process of construction, these bars and joint strip are retained in proper position by means of spring clips 8 or equivalent devices, which are adapted to clamp opposite sides of the bars, and consist of, in the present instance, a spring which is bent upon itself to form spring arms which are maintained in closed position by means of a ring 9. The inner face 10 of a bar 7 is preferably substantially flat while the outer face thereof has near its top an inclined wall 11 which forms a wedgeshaped portion at the top of the bar, so thaty the concrete work is finished with a rounded edge which is less likely to break with wear than if a straight joint was formed against the bar. The outer face of a bar near its lower end is preferably tapered or inclined downwardly, as indicated at 12.

13 designates stakes, which are secured to the bar 7, in the present instance, by riveting the same thereto, as indicated at 14. The stakes 13 are provided with an enlarged head 15 in order that the same may be readily driven into posit-ion in the roadbed or foundation of the construction.

In the embodiment seen in Fig. 3, the construction is the same except that I employ stakes 16 which are provided with an oil'set' l or shoulder 17 so that it is only necessary for the workmen to drive the stakes in as far asthe shoulder, and the top of the expansion 'joint will define the finished line of the road. v

In the embodiment seen in Fig. 5, the joint strip 18 has on opposite sides thereof the bars 19 which have portions 2 0 thereof punched out in ,order to receive a spike or,

' stake' 21 which is provided with an enlargedfhead 22 so that when it is driven into position in the roadbed the expansion joint will have its upper edge at the proper height above the roadbed. lfdesired, portions 23y may be sheared from the bars and punched out in order to form anchoringv elements to be embedded by the concrete, but such anchoring elements may be dispensed with, if desired.

In constructing the pavement,.the earth, roadbed or foundation, is finished to the requisite height in any desired manner. The

bars 7, which form armor plates are riveted to the stakes andtwo of such armors and stakes are employed on opposite sides of the joint strip, and the parts are retained in position by means of clips 8. The

. stakes are then driven into the earth, bed

or foundation, so lthat Ithey not only anchor and support the bar`- but support itat the proper level. Roads in which joint strips are employed are usually from fourteen to sixteen feet wide with crowns of about two inches, and in accordance with my invention, the expansion joint would bel formed so as to conform to the crown of the road, and thel stakes are driven in the requisite distance between the bar tothe finished level. The road material is then worked to the joint and the expansion joint thus performs a double function of an expansion joint and also that of a templet. After the concrete or other material is in place, the clips which hold the two armor strips to the expansion strip are removed, and the construction is allowed to set. rlhe expansion joint, in accordance with mypresent invention, is supported and carriedby the earth, roadbed, or foundation, as the armor bars or lates, which protect the upper edges of the joint strip, are riveted or otherwise secured to the stakes, which latter are driven directly into the earth, roadbed, or foundation.

It will now be apparent that ll have devised a novel and useful pavement and armored joint. strip therefor, which embodies the features of advantage enumerated as deportion.

naa-ieee sirable in the 'statement of the invention and the above description, and while l have, in the present instance, shown and described preferred embodiments thereof which will give in practice satisfactory and reliable results, it is to be understood that the same are susceptible of modilication in various par-x ticulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what ll claim as new and desire to secure by Letters Patent, is z- 1. A. pavement, comprising'a foundation portion and a top portion, the latter consist- `ing of a plurality of concrete sections Separated from each other by expansion joints,

the expansion joints having an armor eX- tending along the upper portion of the edges of the concrete sections, and stakes secured to said armor and having shoulders intermediate their ends to limit the driving length fof a stake and define the contour of the finished construction.

2. A pavement, comprising a foundation -portion and a top portion, the latter consist- 3. A pavement, comprlsing a foundation portion and a top portion, the latter consisting of concrete sections and expansion joints connecting said sections, said expansion joints comprising a joint strip, armor plates on opposite. sides thereof each having wedge-shaped.- portions at their upper ends, and stakes rigidly secured directly to the sides of said armor plates beneath the wedge-shaped ortions thereof and having a head located elow said wedge-shaped portions and aida ted to receive an impact blow to drive sai .stakes into said foundation ANTHONY 1E. DAVllS.

Witnesses: Y

H. S. lFArRBANns, C. D. MCVAY.

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